CN102487469B - Ear shield and head-mounted noise reduction earphone - Google Patents
Ear shield and head-mounted noise reduction earphone Download PDFInfo
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- CN102487469B CN102487469B CN201010572395.4A CN201010572395A CN102487469B CN 102487469 B CN102487469 B CN 102487469B CN 201010572395 A CN201010572395 A CN 201010572395A CN 102487469 B CN102487469 B CN 102487469B
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- earmuff
- ear
- ear pad
- earphone
- circuit board
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Abstract
The invention provides an ear shield and a head-mounted noise reduction earphone using the ear shield, which are applicable to the technical field of electronic products. The ear shield comprises a body having a cavity and an ear pad arranged in edge of the cavity; the ear pad is in an oval ring structure suitable to the shape of an ear; and grid net is arranged in the inner side wall of the ear pad ring structure. In the invention, the inner side of the ear pad is designed into the ventilated grid net; when the ear shield is applied to the earphone, an equivalent volume of the ear shield is increased, so that the needed equivalent volume and an appropriate damping coefficient can be obtained in the ear shield, self-excitation can be prevented, and a negative pressure effect generated under a closed state can be reduced; on the other hand, through the ventilated grid net, a frequency response superimposed effect generated in a coupling or feeding back process can be improved; a sound pressure level peak value and a bandwidth uniformity generated by sound wave reflection can be reduced; simultaneously, the grid net is excellent in ventilation property, and comfortable degree of users when wearing the earphone is greatly improved.
Description
Technical field
The invention belongs to technical field of electronic products, more particularly, relate to a kind of earmuff and adopt the head-mounted noise reduction earphone of this earmuff.
Background technology
Along with improving constantly of living standard, listening attentively to music becomes people in the work mood of releiving after the leisure, a kind of mode easing off the pressure.Meanwhile, along with the continuous pursuit of people to high-quality life, people also require higher for the quality of earphone.And the starting point that manufacturer combines from humanistic care and health idea in order to allow each user can listen to the true pure tone of life in noisy environment, and can be protected hearing, satisfy the demands of consumers and develop Intelligent noise reduction earphone.
Noise cancelling headphone is in the market mainly to realize noise reduction by internal circuit, and in external structure without special noise reduction process.
Summary of the invention
Technical problem to be solved by this invention is to overcome the defect of prior art, provides a kind of and makes improvements in structure, and improve the earmuff of noise reduction and adopt the head-mounted noise reduction earphone of this earmuff.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of earmuff is provided, comprise that one has the body of inner chamber and is located at the ear pad of interior cavity edge, described ear pad is the elliptical annular structure that adapts to external ear shape, the interior ring-side wall of described ear pad circulus has grid screen, and the area of described grid screen is 40cm
2～50cm
2, the outer surface of described ear pad circulus adopts protein cladding to make, and described grid screen is gauze, and the area of described gauze accounts for 45%～60% of described protein cladding area.
Particularly, the each grid on described grid screen assume diamond in shape, square or circular.
Particularly, be provided with driver and transducer in described inner chamber, described driver is provided with diaphragm, and described transducer is located at the top edges of described diaphragm place one side, and the sensitive surface of described transducer is identical with the direction of vibration of described diaphragm.
Preferably, between described inner chamber and described ear pad, be also filled with high damping mandruka.
Further, on the shell of described earmuff, be also provided with an opening, on described opening, be coated with net sheet.
Further, in described inner chamber, be also provided with power supply, circuit board, described transducer is connected between described power supply and described circuit board, and described circuit board is connected with described driver, is also provided with one and can stretches into the interface being connected with described circuit board for audio signal connecting line on described body.
The present invention also provides a kind of head-mounted noise reduction earphone, comprises a headband, and wherein the two ends of headband are provided with above-mentioned earmuff.
In the present invention, ear pad inner side is designed to the grid screen of permeability type, in the time being applied on earphone, increase on the one hand the equivalent volume of ear pad self, thereby make can obtain required equivalent volume and suitable damping coefficient in earmuff, prevent self-excitation, alleviated the underbalance effect producing under closed state; On the other hand, the grid screen of permeability type has improved the frequency response synergistic effect producing in coupling or feedback procedure, has reduced sound pressure level peak value and bandwidth unevenness that acoustic reflection produces; Meanwhile, grid screen good permeability, has also improved comfort level when user wears greatly.
Accompanying drawing explanation
Fig. 1 is the structural representation of a preferred embodiment of earmuff provided by the invention;
Fig. 2 is that in the embodiment of the present invention, cuing open of ear pad shown schematic diagram;
Fig. 3 is that in the embodiment of the present invention, cuing open of earmuff shown schematic diagram;
Fig. 4 is earmuff one schematic perspective view in the embodiment of the present invention;
Fig. 5 is another schematic perspective view of earmuff in the embodiment of the present invention;
Fig. 6 is the fundamental diagram of circuit board in the embodiment of the present invention;
Fig. 7 is the perspective view of a preferred embodiment of head-mounted noise reduction earphone of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of earmuff, comprise that one has the body of inner chamber and is located at the ear pad of interior cavity edge, described ear pad is the elliptical annular structure that adapts to external ear shape, and the interior ring-side wall of described ear pad circulus has grid screen.
In the present invention, the grid screen that ear pad inner side is designed to permeability type, has increased the equivalent volume of ear pad self on the one hand, thereby has made can obtain required equivalent volume and suitable damping coefficient in earmuff, prevent self-excitation, alleviated the underbalance effect producing under closed state; On the other hand, ventilative grid screen has improved the frequency response synergistic effect producing in coupling or feedback procedure, has reduced sound pressure level peak value and bandwidth unevenness that acoustic reflection produces; Meanwhile, grid screen good permeability, has also improved comfort level when user wears greatly.
Below in conjunction with accompanying drawing, the specific implementation of the embodiment of the present invention is described in detail.
Referring to figs. 1 through Fig. 3, earmuff 1 comprises that one has the body 2 of inner chamber 21 and is located at the ear pad 3 at inner chamber 21 edges.Ear pad 3 is the elliptical annular structure that adapts to external ear shape.Ear pad 3 is made by protein cladding 31 and grid screen 32, and fills in the inner memory foam 33 and form.In the present embodiment, grid screen 32 is gauze.
As one embodiment of the invention, protein cladding 31 is positioned at the outer surface of ellipsoidal structure.In use, people's ear is placed in interior ring just, thereby obtains good air-tight state, effectively prevents that noise from importing into from the external world.And people's ear is placed in after interior ring, the protein cladding 31 that is placed in outer surface just and the skin contact of head, due to the softness that protein cladding 31 has itself, makes people's comfortable wearing, and air-tightness is good, has improved the effect of passive noise reduction; Meanwhile, protein cladding 31 antiseptic properties are fabulous, therefore also extended the useful life of ear pad 3; In addition, protein cladding Long contact time skin can keep constant temperature, can not cause wear uncomfortable because of heating.
As one embodiment of the invention, grid screen 32 is positioned on the sidewall of ring of elliptical annular structure.Grid screen 32 structural designs that this perforate is ventilative, on the one hand, effectively increase the equivalent volume of ear pad 3 self, thereby adjust the required equivalent volume of earmuff 1 and obtain suitable damping coefficient by the equivalent volume that increases ear pad 3, prevent earphone generation self-excitation, alleviated the underbalance effect producing under closed state; On the other hand, perforate grid on grid screen 32 has improved the frequency response synergistic effect producing in coupling and feedback procedure, reduce the sound pressure level peak value that produces because of acoustic reflection and the unevenness of bandwidth, in 500～1200Hz frequency band range, can reduce peak value 4～6dB especially, also resisted the self-excitation producing under earphone operating state, make the frequency response curve of whole frequency band more level and smooth, broad, thereby guaranteed stereovision and the soften of tonequality; Simultaneously, the grid good permeability of grid screen 32, improve the comfort level of wearing, in the time that earmuff 1 should be in earphone, earphone is worn on when upper because of under chucking power effect, grid on grid screen 32 can be discharged rapidly the air in ear pad 3 and be made ear pad 3 fit in better people's ear, improves sealing, plays the effect of passive noise control.After earphone takes off from the head, air is filled in memory foam 33 by grid screen 32 rapidly again, thereby has kept ear pad 3 outward appearance integrality and stability.
In the present embodiment, in protein cladding 31 and the interior filling memory foam 33 of grid screen 32.Memory foam 33 is in terms of mechanics such as impact-absorbing power, minimizing vibrations, low bounce releases, and performance is leading.And its gas permeability, good hygroscopicity, human body contact impression is comfortable.
Further, as one embodiment of the invention, the shape that assumes diamond in shape of the each grid on grid screen 32.Diamond structure is sesame seed size, has not only guaranteed the compactness of whole grid screen cloth braiding, has also guaranteed gas permeability.Square, circular or other shape that certain each grid also can be.
Further, the area of grid screen 32 is 40cm
2～50cm
2, and it accounts for 45%～60% of protein cladding 31 areas.The size and the ratio that adopt this perforated area, have best acoustic absorptivity and absorption, can improve to greatest extent noise reduction ratio and improve the smoothness of frequency response curve of earphone.In addition, this ratio can strengthen the flexibility of ear pad, the impact of minimizing negative pressure, user is worn more naturally comfortable.
As one embodiment of the invention, please refer to Fig. 3, Fig. 4, in inner chamber 21, be provided with a support 4, fix a driver 5 in the below of support 4, driver 5 is provided with diaphragm (not shown), and diaphragm is positioned on driver 5 and a side of close support 4.Top one lateral edges of support 4 is provided with a transducer 6.The sensitive surface of transducer 6 is identical with the direction of vibration of diaphragm.Like this, transducer 6 reception sound waves line of propagation are consistent by diaphragm radiated sound wave line of propagation with driver 5, be conducive to transducer 6 and detect in real time better, more in all directions the noise in duct and earmuff 1 inner chamber after earphone is worn use.
As one embodiment of the invention, the top edges of support 4 is provided with a holder 7, and holder 7 is a plastic cement seat.Transducer 6 adopts glue to be fixed in holder 7.Adopt this fixed form, sealing and fixed effect are all better, effectively prevent the loosening or gas leakage of transducer 6 and cause producing and uttering long and high-pitched sounds and buzzer in use procedure.
Further, with reference to Fig. 4, between inner chamber 21 inner supports 4 and ear pad 3, be also filled with sponge 8, sponge 8 is high damping mandruka, it can absorb the noisy audio signal of part in earmuff, strengthen passive noise reduction, improve the smoothness of frequency response curve, thereby avoid ear pad 3 and the interior generation of inner chamber 21 effect of thundering.
Further, with reference to Fig. 5, body 2 is away from one end of ear pad 3 trim 9 that removably connects.Trim 9 is provided with an opening 91, and on opening 91, is coated with net sheet 92.Opening 91, as an acoustic resistance mouth, is adjustment damping coefficient and sound press output characteristic and designs, and net sheet 92 is for being bonded in the thin metal fine-structure mesh on opening 91, and its thickness, fine mesh number and entrant sound amount are the balanced arrangement of noise reduction amplitude and frequency response.
As one embodiment of the invention, in inner chamber 21, be also provided with power supply (not shown), be also provided with a circuit board 10 in the below of support 4, circuit board 10 is one to have the electronics connecting plate of decrease of noise functions.Transducer 6 is connected between power supply and circuit board 10, and circuit board 10 is connected with driver 5 simultaneously.On the sidewall of body 2, be also provided with one and can stretch into the interface 22 being connected with circuit board 10 for audio signal connecting line.By interface incoming audio signal connecting line, can make earphone be connected with extraneous music player, and by earphone listoning music.In the time of electric power starting, transducer 6 detects the environmental noise between inner chamber 21 and the ear pad 3 of duct, earmuff 1, then be transferred to circuit board 10, circuit board 10 feeds back to driver 5 after overcoupled circuits computing, thereby after driver 5 pickoff signals, obtain again sound wave equating with noise waves single spin-echo, energy of control signal generation and the noise waves counteracting of an optimum through circuit board 10 real-time operations, thereby reach the object of noise reduction.
With reference to Fig. 6, be the principle of noise reduction figure of circuit board 10.Wherein, noise signal acquisition module 101 obtains noise signal.The noise signal that noise signal amplification module 102 obtains noise signal acquisition module 101 carries out yardstick refinement, and the noise signal obtaining is amplified.
Preferably, described noise signal amplification module 102 specifically comprises phase place and frequency information acquisition module 1021, phase subdivision module 1022 and frequency fine sub-module 1023:
Phase place and frequency information acquisition module 1021 obtain phase place and the frequency in noise signal cycle time;
Phase subdivision module 1022 is segmented noise signal with phase place at high frequency treatment;
Frequency fine sub-module 1023 is sentenced frequency at low frequency noise signal is segmented.
Noise signal decomposing module 103 is decomposed noise signal, obtains main noise signal and point noise signal.
Noise signal processing module 104 is carried out denoising Processing to the noise signal after amplifying.
Preferably, described noise signal processing module 104 specifically comprises phase wave signal acquisition module 1041, rp-wave calculated signals module 1042 and phase wave signal cancellation module 1043:
The main noise signal that phase wave signal acquisition module 1041 obtains noise signal decomposing module 103 and a point noise signal carry out analyzing and processing, obtain corresponding phase wave signal;
Rp-wave calculated signals module 1042 calculates rp-wave signal according to the rule of system setting;
Phase wave signal cancellation module 1043 is controlled phase wave signal described in the rp-wave signal cancellation that described rp-wave calculated signals module 1042 calculates.
By above-mentioned Dolby circuit, noise signal has been carried out to effective active noise reduction, make on the basis of the passive noise reduction of earmuff, to obtain in the embodiment of the present invention better noise reduction.
With reference to Fig. 7, it is the perspective view of a preferred embodiment of head-mounted noise reduction earphone 11 provided by the invention.Described head-mounted noise reduction earphone 11, it comprise a headband 111 and two 1, two earmuffs 1 of earmuff that are flexibly connected with headband 111 two ends respectively identical with above-mentioned earmuff 1 structure, do not repeat herein.
Adopt the head-mounted noise reduction earphone 11 of above-mentioned earmuff 1, excellent noise reduction effect, can better listen to environment for user provides.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. an earmuff, comprise that one has the body of inner chamber and is located at the ear pad of interior cavity edge, described ear pad is the elliptical annular structure that adapts to external ear shape, it is characterized in that: the interior ring-side wall of described ear pad circulus has grid screen, and the area of described grid screen is 40cm
2～50cm
2, the outer surface of described ear pad circulus adopts protein cladding to make, and described grid screen is gauze, and the area of described gauze accounts for 45%～60% of described protein cladding area.
2. earmuff as claimed in claim 1, is characterized in that: the each grid on described grid screen assumes diamond in shape, square or circular.
3. earmuff as claimed in claim 1, it is characterized in that: in described inner chamber, be provided with driver and transducer, described driver is provided with diaphragm, and described transducer is located at the top edges of described diaphragm place one side, and the sensitive surface of described transducer is identical with the direction of vibration of described diaphragm.
4. earmuff as claimed in claim 3, is characterized in that: between described inner chamber and described ear pad, be also filled with high damping mandruka.
5. earmuff as claimed in claim 3, is characterized in that: on the shell of described earmuff, be also provided with an opening, be coated with net sheet on described opening.
6. earmuff as claimed in claim 3, it is characterized in that: in described inner chamber, be also provided with power supply, circuit board, described transducer is connected between described power supply and described circuit board, described circuit board is connected with described driver, is also provided with one and can stretches into the interface being connected with described circuit board for audio signal connecting line on described body.
7. a head-mounted noise reduction earphone, comprises a headband and is located at the earmuff at headband two ends, it is characterized in that: described earmuff is the earmuff as described in any one in claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010572395.4A CN102487469B (en) | 2010-12-03 | 2010-12-03 | Ear shield and head-mounted noise reduction earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010572395.4A CN102487469B (en) | 2010-12-03 | 2010-12-03 | Ear shield and head-mounted noise reduction earphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102487469A CN102487469A (en) | 2012-06-06 |
| CN102487469B true CN102487469B (en) | 2014-07-09 |
Family
ID=46152916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010572395.4A Active CN102487469B (en) | 2010-12-03 | 2010-12-03 | Ear shield and head-mounted noise reduction earphone |
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| CN (1) | CN102487469B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103905944A (en) * | 2012-12-26 | 2014-07-02 | 奥笙股份有限公司 | Play device |
| CN105516843B (en) * | 2014-09-24 | 2019-02-15 | 美律电子(深圳)有限公司 | Earmuff with compound coating set |
| CN104602157B (en) * | 2015-01-28 | 2018-11-02 | 深圳市冠旭电子股份有限公司 | A kind of earphone noise-reduction method and device |
| WO2016181531A1 (en) * | 2015-05-13 | 2016-11-17 | Ｏｍｏｔｅｎａｓｙ合同会社 | Headphones |
| US20180139525A1 (en) * | 2015-07-07 | 2018-05-17 | Shenzhen Royole Technologies Co., Ltd. | Ear muff |
| CN105472498A (en) * | 2015-12-10 | 2016-04-06 | 深圳市禹欣鑫电子有限公司 | Medical smart sleeping headset, sleep monitoring system comprising medical smart sleeping headset and implementation method of sleep monitoring system |
| CN107750026A (en) * | 2017-10-31 | 2018-03-02 | 江西联创电声有限公司 | Headphone |
| CN110267147B (en) * | 2019-07-17 | 2020-09-18 | 东莞市实优特电子有限公司 | Combined multipurpose head-wearing earphone |
| US20240071352A1 (en) * | 2021-05-18 | 2024-02-29 | Shenzhen Grandsun Electronic Co., Ltd. | Noise reduction earpad, noise reduction earmuff and noise reduction headphone |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297321A (en) * | 1999-07-15 | 2001-05-30 | 伯斯有限公司 | Noise-reducing earpiece |
| CN201160318Y (en) * | 2007-09-24 | 2008-12-03 | 东莞市品泰海棉有限公司 | Ear shield of earphone |
| CN101410900A (en) * | 2006-03-24 | 2009-04-15 | 皇家飞利浦电子股份有限公司 | Device for and method of processing data for a wearable apparatus |
-
2010
- 2010-12-03 CN CN201010572395.4A patent/CN102487469B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297321A (en) * | 1999-07-15 | 2001-05-30 | 伯斯有限公司 | Noise-reducing earpiece |
| CN101410900A (en) * | 2006-03-24 | 2009-04-15 | 皇家飞利浦电子股份有限公司 | Device for and method of processing data for a wearable apparatus |
| CN201160318Y (en) * | 2007-09-24 | 2008-12-03 | 东莞市品泰海棉有限公司 | Ear shield of earphone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102487469A (en) | 2012-06-06 |
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Address after: Longgang District of Shenzhen City, Guangdong province 518116 Ping Street Takahashi Industrial Park East Area Patentee after: SHENZHE GUANXU ELECTRONIC CO., LTD. Address before: Longgang District of Shenzhen City, Guangdong province 518116 Ping Street Takahashi Industrial Park East Area Patentee before: Shenzhen Grandsun Electronic Co., Ltd. |